Telescopic sight mounting



33-2a5. m 2,517,274 5R SEARQH ROOM g 1950 F. c. BAKER EI'AL 2,517,274

TELESCOPIC SIGHT MOUNTING Filed Aug. 24, 1948 2 Sheets-Sheet l INVENTORS FREDERICK C BAKER ELBERT GARY SPENCER ATTO RN EY swan ROOM 1950 F. c. BAKER ETAL 2,517,274

TELESCOPIC SIGHT MOUNTING Filed Aug. 24,. 1948 2 Sheets-Sheet 2 IN V EN TORS FRED- CK BAKER ELBE GA SPENCER BY ATTORNEY Patented Aug. 1, 1950 UNITED some R'GOM TELESCOPIC SIGHT MOUNTING Frederick C. Baker and Elbert Gary Spencer, Portland, Oreg.

Application August 24, 1948, Serial No. 45,804

Claims. (Cl. 33-50) This invention relates to means for mounting a telescopic sight on a gun or rifle and, in particular, to detachable and adjustable mountings for such telescopic sights.

Since telescopic sights are delicate and quite expensive it is customary to remove the telescopic sight when the gun is not being used so that the sight can be kept and protected in a separate and suitable case. For this reason it is desirable to have a telescopic sight mounting which will enable the sight to be removed from the gun quickly and easily, and which will also make it possible to remount the sight on the gun just as quickly and easily. Furthermore, it is very desirable to have a mounting whichwill 1Il.-. 'l5

sure th e return of the telmopic iehtiolexactly tlze sameielatiijsitio'n with respect to the axis of the gun borefand'with gieat accuracy, so that no further adjusting and testing will be required each time the telescopic sight is subsequently remounted on the gun, since considerable time could be consumed in readjusting and testing the telescopic sight.

In addition to having a telescopic sight mounting permitting the telescopic sight to be quickly demounted and then quickly remounted, and with a high degree of accuracy, it is desirable that the mounting, and specifically that portion of it which is removable with the telescope, also provide means whereby the relative position of the telescope with respect to the axis of the bore of the gun can be given a minute and accurate adjustment. While adjustment for alignment with the gun bore axis can be made within the telescope itself when necessary, nevertheless, it is much more desirable and less confusing to the user of the gun if this adjustment can be initially made in the mounting of the telescope, for in such case the user of the gun need not further concern himself with the alignment adjustment or with the making of allowance therefor.

An important object of the present invention is to provide a detachable telescopic sight mounting for a gun in which the initial alignment adjustment for the sight, it necessary, can be made in that portion of the mounting which is to'be more or less permanently attached to the telescope and thus removable with it.

Another object of the invention is to provide a simplified and practical means for such alignment adjustment of the telescope in the mounting on the gun.

A further object of the invention is to provide an improved telescopic sight mounting which will permit the desired quick and easy demounting and remounting of the telescopic sight on the gun without the necessity of further adjustment.

The manner in which these objects and other advantages are attained through the medium of our present invention will become apparent in the course of the following brief description and explanation with reference to the accompanying drawings, in which:

Fig. 1 is a side elevation of our improved telescopic sight mounting showing one portion of the same permanently secured to the gun stock, and the other portion secured to the telescopic sight and illustrating the telescopic sight in demounted position;

Fig. 2 is a similar elevation showing both parts of our telescopic sight mounting and illustrating the telescopic sight in mounted position on the 811 Fig. 3 is a transverse vertical section on line 3-3 of Fig. 2, with the telescopic sight omitted;

Fig. 4 is a similar section on line 4-4 of Fig. 2 with the telescopic sight omitted;

Fig. 5 is an exploded view showing, in perspective, all the members of both parts of our telescopic sight mounting separated from each other but arranged in their relative positions, with the telescopic sight and the gun entirely omitted from the figure;

Fig. 6 is an end elevation of our telescopic sight mounting with the telescopic sight shown mounted on the gun, the view being taken from the right in Fig. 2 and corresponding to line 6--6 of Fig. 2, with portion of the gun stock and the gun barrel indicated in broken line; and

Fig. 7 is an end elevation similar to Fig. 6, but drawn to a larger scale, and illustrating how a more or less permanent alignment adjustment of the position of the telescope within the mounting can be made.

In general, our telescopic sight mounting comprises two parts or two groups of members. One part or group, which constitutes the base portion and is designated by the reference character ID in Fig. 1, is intended to be permanently secured to the gun stock I2. The other part or group, which constitutes the telescope-holding part and which is designated collectively by the reference character II, is intended to remain attached to the telescopic sight I! whether the telescopic sight is in mounted or demounted position.

The part II of our mounting, which is secured to the gun stock 12, includes a main plate [4, formed with an integral element l5 and an integral tube It (Figs. 1, 2 and 5). The inside face 3 of themain plate I4 is curved to conform to the contour of the adjacent surface of the gun stock I2, and the main plate I4 is firmly and permanently secured to the gun stock by screws H. The integral tube I6 is threaded on its inner cylindrical surface so as to engage with the threads of a thumb screw l8 extending longitudinally therethrough. The inner tip of the thumb screw I6 is cone-shaped. A threaded lock-nut 34 is' pro-- vided in conjunction with the thumb screw I8.

The part or the group II adapted to be secured to the telescopic sight I3, includes a shaftlike member l9 having a pair of integral spaced trough brackets 20 and 2|. One end of the member I9 has a central conical recess 22 (Fig. adapted to be engaged by the cone-shaped tip of the thumb screw I8 when the telescopic sight is mounted on the gun. The other end 23 of the member I9 and the inner end 24 of the element l5 of the other part of the mounting, are formed with a'special grooving (such as is described in our copending application, Serial No, 764,110,

filed under date of July 28, 1947, now Patent No.

2,470,282, granted May 17, 1949, and entitled Mounting for Shafts and the Like), causing the opposed ends to interfit and the member I9: to be non-rotatably and rigidly secured inabsolute axial alignment with the element I5 and tube I6 when the cone-shapedend of the thumb screw I8 engages the conical recess 22 of the member I9 and the thumb screw is tightened.

The trough brackets and 2| have-their inner faces lying in a pair of planes which are per--. p'endicular to each other, the corresponding in.

ner faces of the two brackets extending in the same plane. A pair of telescope-supporting blocks 25 and 26 (shown most clearly in Fig. 5) are provided to be mounted in the brackets 20 and 2|. each block lie in a pair of planes which are perpendicular to each other and the top face of each block comprises a convex surface having a radius of curvature approximately equal to the radius of the cylindrical outer surface of the telescopic sight I3. To hold the blocks 25 and 26 from moving endwise in the trough brackets each bracket has a central lug 21 (see Fig. 2) extend-. ing upwardly from the bottom of: the trough and each block is formed with a corresponding lugengagingrecess 28 in the bottom ridge.

A metal strap or loop 29 is arranged so as to extend around the telescope body between the brackets 20 and 2 I. The ends of this metal strap 29 are turned inwardly and upwardly (see Figs. 3

and 5) and engage a groove 30 in the bottom face.

of a clamping bar 3|. A pair of. screws 32 extending through, holes 33- passing diametrically through the member l9, engagethreaded recesses in the clamping bar 3| and act tolpull the clamping bar 3 I, and with it the ends of the metal strap 29, toward the member I9. Thus, when the telescopic sight I3 is inserted in the metal strap 29, the blocks 25 and 26 having previously been placed in the trough brackets 20 and 2 I, the tight-,.;

.65 telescopic sight firmly against the blocks 25 and e 26 with the result that the telescopic sight will .be

ening of the screws 32 will pull the body of the The two bottom faces or undersides of ways be secured in identically the same position with respect to the plate I4 and the integral element [5 and tube I6, the telescopic sight, when mounted and remounted on the gun will always assume exactly the same relative position with respect to the axis of the gun bore.

It is of course probable that when the telescopic sight is initially secured to part II of our mounting and then mounted on the gun by having part II firmly attached in place on part II) of the mounting, as previously described, the telescopic sight will not be in exact perfect alignment. This is quite probable since even a difference of /1000 of an inch would make a considerable error as far as absolutely perfect alignment is concerned. While the necessary compensating adjustment to correct any such errors can be made in the adjusting means in the tele scopic sight itself, it is preferable, when this can be done, to have th telescopic sight set in the mounting in perfect alignment. Then the necessity for further adjustment for alignment in the telescopic sight itself will be eliminated. An important feature of our present invention resides in the provision for the making of such adjustment for alignment in the mounting itself.

Let it be assumed that when the telescopic sight is first mounted on. th gun in the manner previously described, the telescopic sight is found by trial to be slightly out of alignment. Without removingthe telescopic sight or any part of the mounting from the gun, alignment adjustments can be made if desired in the manner illustrated in Fig. '7 The screws 32 are first loosened, thus loosening the metal strap 29 which permits the telescopic sight and the supporting blocks 25 and 26 to be moved slightly in the mounting. Since the two underneath faces of the blocks 25 and 26 constitute planes at right angles to each other, th same as the trough faces of the brackets 20 and 2 I, it will be apparent that any desired positioning adjustment can be made by theinsertion of one or more sheets of very thin paper or metal between one or more of the four faces of the brackets and corresponding face or faces of the blocks. Thus Fig. '7 illustrates the insertion of such a thin paper or metal shim between one face of a bracket and a corresponding face of its [bl0ck. If upon trial it is found that the insertion of one such shim, say of /1000 of an inch in thickness, between one face of a block and its bracket, does not correct the alignment error entirely, then further adjustment can be made in the same manner. Generally, however, it will be unnecessary to try more than one adjustment. While such adjustment does require a little time at the outset, nevertheless this expenditure of time is more than justified by the resulting subsequent convenience and by the fact that the adjustment then becomes permanent inasmuch as the shim or shims can remain in place as long as the telescopic sight remains secured in part I I of our mounting, and, as previously explained, the demounting and remounting of the telescopic sight on the gun is done without any removal of the telescopic sight from part I I of the mounting.

; ment thereafter maintained without further change regardless of subsequent demounting and remounting of the telescopic sight.

We claim: I

1. A detachable telescopic sight mounting, of the character described, for a gun, comprising a base portion adapted to be permanently attached to the gun and a telescope=holding-partradapted to be detachablysecured in said base, said telescope-holding part including a main shaft-like member, a pair of supporting brackets rigidly secured to said main member and spaced apart in a direction parallel to the axis of the gun barrel, the top portion of each bracket having two ,intersectingplane faces forming a bearing surface in the shape of a right dihedral angle, the respective faces of said dihedral angles extending in the same planes, the lines of intersections of the faces of said dihedral angles being in alignment with each other and extending parallel to said gun barrel axis, one face of each of said dihedral angles being substantially vertical and the other face substantially horizontal when said gun is in normalhorizontal fifigjrositionfa telescope-supporting block removably positioned in each bracket, each of said blocks having a pair of intersecting plane faces perpendicular to each other and adapted to coincide with the dihedral angle faces of the supporting bracket respectively, a concave outer face on each block having a curvature corresponding to the outer surface of the telescope, engaging means preventing any movement of said blocks in a direction parallel to said gun barrel axis when said blocks are positioned in said brackets while permitting said blocks to move outwardly from said brackets in a direction normal to said axis,. adjustablmmeansi lg ll fi with said main shaft-like member for holdin said telescope firmly pressed against said outer concave faces of said blocks, and means for rigidly but detachably securing said main shaft-like memberin fixed predetermined position in said base portion, whereby any slight permanent adjustment of the alignment of said telescope with respect to said gun barrel axis can be made by inserting a thinshims'between a face,QLaIbracket andth''adjacent face of the corresponding block.

2. A detachable telescopic sight mountin for a gun including a base portion adapted to be permanently attached to the gun, a telescopeholding part adapted to be detachably secured in said base, said telescope-holding part including a main member, a pair of supporting brackets rigidly secured to said main member and spaced apart in a direction parallel to the axis of the gun barrel, the top portion of each bracket having two intersecting plane faces forming a, bearing surface in the shape of a right dihedral angle, the respective faces of said dihedral angles extending in the same planes, the lines of intersections of the faces of said dihedral angles being in alignment with each other and extending parallel to said gun barrel axis, a telescope-supporting block removably positioned in each bracket, each of said blocks having a pair of intersecting plane faces perpendicular to each other and adapted to coincide with the dihedral angle faces of the supporting bracket respectively, an outer face on each block acting as a supporting bearing for the telescope, engaging means preventing any movement of said blocks in a direction parallel to said gun barrel axis when said blocks are positioned in said brackets while permitting said blocks to move outwardly from said brackets in a direction normal to said axis, adjustable means connected with said main member for holding said telescope firmly pressed against said outer faces of said blocks, and means .for rigidly but detachably securing said main member in fixed predetermined position in said base portion.

3. In a detachable telescopic sight mounting of the character described, a base portion adapted to be permanently attached to a gun, a telescopeholding part adapted to be detachably secured in said base, said telescope-holding part including a main shaft-like member, a pair of supporting brackets rigidly secured to said main member and spaced apart in a direction parallel to the axis of the gun barrel, the top portion of each bracket having two intersecting plane faces forming a bearing surface in the shape of a right dihedral angle, the respective faces of said dihedral angles extending in the same planes, the lines of intersections of the faces of said dihedral angles being in alignment with each other and extending parallel to said gun barrel axis, one face of each of said dihedral angles being substantially vertical and the other face substantially horizontal when said gun is in normal horizontal firing position, a telescope-supporting block removably positioned in each bracket, each of said blocks having a pair of intersecting plane faces perpendicular to each other and adapted to coincide with the dihedral angle faces of the supporting bracket respectively, a concave outer face on each block having a curvature corresponding to the outer surface of the telescope, adjustable means connected with said main member for holding said telescope firmly pressed against said outer concave faces of said blocks, and means for rigidly but detachably securing said main member in fixed predetermined position in said base portion.

4. In a detachable telescopic sight mounting, a base portion adapted to be permanently attached to a gun, a telescope-holding part adapted to be detachably secured in said base, said telescope-holding part including a main member, a pair of supporting brackets rigidly secured to said main member and spaced apart in a direction parallel to the axis of the gun barrel, the top portion of each bracket having two intersecting plane faces forming a bearing surface in the shape of a right dihedral angle, the respective faces of said dihedral angles extending in the same planes, the lines of intersections of the faces of said dihedral angles being in alignment with each other and extending parallel to said gun barrel axis, a telescope-supporting block removably positioned in each bracket, each of said blocks having a pair of intersecting plane faces perpendicular to each other and adapted to coincide with the dihedral angle faces of the supporting bracket respectively, an outer face of each block acting as a supporting bearing for the telescope, adjustable means connected with said main member for holding said telescope firmly pressed against said outer faces of said blocks, and means for rigidly but detachably securing said main member in fixed predetermined position in said base portion.

5. In a detachable telescopic sight mounting of the character described for a gun, a base portion adapted to be permanently attached to the gun, a telescope-holding part adapted to be detachably secured in said base, said telescope-holding part including a main member, a pair of supporting brackets rigidly secured to said main member and spaced apart in a direction parallel to the axis of the gun barrel, the top portion of each bracket having two intersecting plane faces ate '7 forming a bearing surface in the shape of a dihedralangle, the respective faces of said dihedral angles extending in the same planes, the lines of intersections ofthe faces of said dihedral'angles being in alignment with each other and ex-. tending parallel to said gun barrel axis, a telescope-supporting block removably positioned in each bracket; each of said blocks having a pair of intersecting plane facesadapted to coincide with the dihedral angle faces of the supporting bracket respectively, an outer face on each block acting as a supporting bearing for thetelescope, engaging means preventing any movement of said blocks in a direction parallel to said gun barrel axis when said blocks are position'edin said brackets while permitting said blocks to move outblocks, and ineans for rigidly but detachably securing said main member in fixed predetermined position in said base portion.

FREDERICK C. BAKER.

ELBERT GARY SPENCER.

REFERENCES CITED The following references are of record in the flleof this patent:

UNITED STATES PATENTS Number Name Date 773,811} Saegmuller Nov. 1, 1904 1,132,1 7 1.Mauser Mar. 16, 1915 2,142,453 a Moore Jan. 3, 1939 2,193,094 .Gi1bert Mar. 12, 1940 2,350,169 .:Kesse1ring May 30, 1944 2,445,595 Bengert July 20, 1948 

